I went into a supermarket with my pregnant girlfriend went to buy some alcohol but they refused because my girlfriend didn't have any id which was fair enough.
So I took my girlfriend home and returned about 40 minutes later to then buy the alcohol they then again refused because I was in there earlier but at this point I was on my own and they then tried to say I could be buying it for her to take home and give it to her saying she was underage
Can the store do this ??

I went into a supermarket with my pregnant girlfriend went to buy some alcohol but they refused because my girlfriend didn't have any id which was fair enough.
So I took my girlfriend home and returned about 40 minutes later to then buy the alcohol they then again refused because I was in there earlier but at this point I was on my own and they then tried to say I could be buying it for her to take home and give it to her saying she was underage
Can the store do this ??

Yes, the store has the right to withhold selling alcohol if they believe the buyer will give it to someone underage. If the store is caught doing this, then it can be fined thousands of pounds, so it is not in their interest, and employees can lose their jobs over it too.

I went into a supermarket with my pregnant girlfriend went to buy some alcohol but they refused because my girlfriend didn't have any id which was fair enough.
So I took my girlfriend home and returned about 40 minutes later to then buy the alcohol they then again refused because I was in there earlier but at this point I was on my own and they then tried to say I could be buying it for her to take home and give it to her saying she was underage
Can the store do this ??

Yes, there is nothing compelling them to serve you. Go to a different shop.

I went into a supermarket with my pregnant girlfriend went to buy some alcohol but they refused because my girlfriend didn't have any id which was fair enough.
So I took my girlfriend home and returned about 40 minutes later to then buy the alcohol they then again refused because I was in there earlier but at this point I was on my own and they then tried to say I could be buying it for her to take home and give it to her saying she was underage
Can the store do this ??

Yes.

If you look under 25 they are entitled to insist on ID. And if they suspect you are buying for a minor then they can also refuse. Your gf didn't show ID to establish she isn't a minor.

(Original post by Doonesbury)
Although why a pregnant woman wants alcohol is a whole different problem.

I assumed the alcohol was just for the boyfriend and the supermarket just refused to sell them alcohol because he was with someone who looked underage. If it was for the girlfriend then yeah, there is a problem.

Edit: Then again there are some people that think that a small amount of alcohol isn't a problem and is even beneficial because it reduces stress. I don't know if it is true or not. If the drink was for her then I don't really know enough about what stage of pregnancy and how much she was going to have to have a good opinion on it.